Modular calendar



FIG. 1 is a front elevational view of a modular calendar showing my new design, the removably attached year month and day modules being shown in a typical arrangement;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a modular calendar, as shown and described. 